Lighting device



FIG. 1 is a back view of the lighting device in accordance with our new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a top, right, front, perspective view thereof;

FIG. 8 is a top, left, front, perspective view thereof; and,

FIG. 9 is a top, right, front, perspective view thereof, with associated environmental structure in broken lines.

The broken lines in the drawings represent unclaimed environmental subject matter. 

The ornamental design for a lighting device, as shown and described. 